<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>03_对象3_面试题</title>
</head>
<body>

<script type="text/javascript">
  // 对象中所有的key都是字符串
  var a = {}
  var obj1 = {n:345345345} // toString() = '[object Object]'
  var obj2 = {hh: 4535345} // toString() = '[object Object]'
  a[obj1] = 4
  console.log(a); // {}
  a[obj2] = 5
  console.log(a);
  console.log(a['[object Object]']) // 输出多少? 4 5
</script>
</body>
</html>